<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        * {
            box-sizing: border-box;
        }
        html,body {
            margin: 0;
            padding: 0;
            height: 100%;
            width: 100%;
        }
        main {
            height: 100%;
        }
        header {
            position: relative;
            width: 100%;
            height: 100%;
            max-height: 41.6875rem;
            max-width: 375px;
            margin: 0 auto;
            background: url('image/平台下载背景图层1@2x.png')no-repeat;
            background-size: 100% 100%;
            background-position: 50%;
            padding-top: 2.66rem;
            
        }
        article {
            width: 3.05rem;
            height: 4.01rem;
            margin: 0 auto;
            background: url('image/矢量智能对象拷贝@2x.png')no-repeat;
            background-size: 100% 100%;
        }
        .one {
            width: 5.93rem;
            height: 0.88rem;
            background: url('image/安卓下载@2x.png')no-repeat;
            background-size: 100% 100%;
            margin: 1.2rem auto 0;
        }
        .two {
            width: 5.93rem;;
            height: 0.88rem;
            background: url('image/IOS下载拷贝@2x.png')no-repeat;
            background-size: 100% 100%;
            margin: 0.32rem auto 0;
        }
        @media screen and (min-width: 400px) {
            header {
                background: url('image/平台下载背景图层1@2x.png')no-repeat;
                background-size: 100% 100%;
                max-width: 11.25rem;
                max-height: 18.15rem;
            }
            article {
                background: url('image/矢量智能对象拷贝@2x.png')no-repeat;
                background-size: 100% 100%;
                width: 4.58rem;
                height: 6.02rem;
            }
            .one {
                background: url('image/安卓下载@2x.png')no-repeat;
                background-size: 100% 100%;
                max-width: 8.90rem;
                max-height: 1.32rem;
            }
            .two {
                background: url('image/IOS下载拷贝@2x.png')no-repeat;
                background-size: 100% 100%;
                max-width: 8.90rem;
                max-height: 1.32rem;
            }
        }
        @media screen and (min-width: 720px) {
            header {
                background: url('image/平台下载背景图层1@2x.png')no-repeat;
                background-size: 100% 100%;
                max-width: 29.25rem;
                max-height: 23.68rem;
            }
            article {
                background: url('image/矢量智能对象拷贝@2x.png')no-repeat;
                background-size: 100% 100%;
                width: 3.05rem;
                height: 4.01rem;
            }
            .one {
                background: url('image/安卓下载@2x.png')no-repeat;
                background-size: 100% 100%;
                width: 5.93rem;
                height: 0.88rem;
            }
            .two {
                background: url('image/IOS下载拷贝@2x.png')no-repeat;
                background-size: 100% 100%;
                width: 5.93rem;
                height: 0.88rem;
            }
        }
    </style>
</head>
<body>
    <main>
        <header>
            <article></article>
            <section class="one"></section>
            <section class="two"></section>
        </header>
        
    </main>

    <script src="js/index.js"></script>
</body>
</html>